Effect of Synthesizing Temperature on Microstructure and Electrochemical Property of the Hydrothermal Conversion Coating on Mg-2Zn-0.5Mn-Ca-Ce AlloyReportar como inadecuado




Effect of Synthesizing Temperature on Microstructure and Electrochemical Property of the Hydrothermal Conversion Coating on Mg-2Zn-0.5Mn-Ca-Ce Alloy - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

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College of Mechanics and Materials, Hohai University, Nanjing 210098, China

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Department of Material Science and Engineering, North Carolina State University, Raleigh, NC 27606, USA

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School of Materials Science and Engineering, Southeast University, Nanjing 211100, China

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Jiangsu Collaborative Innovation Center of Advanced Micro-Nano Materials and Equipment, Nanjing University of Science and Technology, Nanjing 210094, China





*

Authors to whom correspondence should be addressed.



Academic Editors: Vineet V. Joshi and Alan Meier

Abstract MgOH2 conversion coatings were formed on an Mg-2Zn-0.5Mn-Ca-Ce alloy via hydrothermal method at three different synthesizing temperatures 160, 170 and 180 °C. The effect of synthesizing temperature on microstructure and electrochemical property of the coatings were systematically studied. With increasing synthesizing temperature, the coating became thicker due to the faster reaction and deposition of MgOH2 on the α-Mg phase and secondary phases of the substrate Mg alloy. Internal micro-cracks were also generated in the higher-temperature synthesized coatings due to the increased shrinking stress, but the cross-cutting micro-cracks were suppressed. Benefiting from the improved barrier effect against penetration of corrosive medium, the higher-temperature synthesized thicker coating presented significantly enhanced electrochemical property and anti-corrosion efficiency in Hanks’ solution. View Full-Text

Keywords: conversion coating; synthesizing temperature; Mg alloy; microstructure; electrochemical property conversion coating; synthesizing temperature; Mg alloy; microstructure; electrochemical property





Autor: Guanghui Guo 1, Dan Song 1,2,3,* , Jinghua Jiang 1,* , Aibin Ma 1,4, Liwen Zhang 2 and Cheng Li 1

Fuente: http://mdpi.com/



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